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首页> 外文学位 >Decreasing the Na+/Ca2+ Ratio Improves the Performance of Pistacia species Grown in Saline Soils.
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Decreasing the Na+/Ca2+ Ratio Improves the Performance of Pistacia species Grown in Saline Soils.

机译：降低Na + / Ca2 +比例可改善盐渍土中生长的黄连木的性能。

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摘要

A reduction in the sodicity has been found to improve crop plants grown in saline conditions, but little is known about the effect of the same on pistachio trees. Therefore, an experiment was conducted to determine the physiological responses of two rootstocks, a UCBI seedling (P.atlantica x P.integerrima ) and a PGII clone (P.integerrima x P.atlantica), both budded with the female Kerman scion, (P.vera cv. Kerman) to two salinity levels with three Na+/Ca2+ ratios. The six salinity treatments and one control were replicated five times. The six treatments were a mixture of NaCl and CaCl2 formulated to produce two levels of salinity (4.5 and 9.5 dS/m) and three different Na+/Ca 2+ ratios (2, 20, and 50 on a molar basis) within each salinity treatment. During the 60-day treatment period, the predawn SWP and relative growth rate were measured. At the end of the experiment, all the plants were harvested, and Na+, K+, Mg2+, Ca +2, and Cl- concentrations in the leaves, and Na+ concentration in roots, rootstock trunk, and scion trunk were measured. Based on the relative growth rate, Kerman on PGII was more tolerant to salinity compared to Kerman on UCBI. Kerman on PGII accumulated more Na+ in its fine roots compared to Kerman on UCBI, but it transferred less Na+ to its mature leaves. In most cases, decreasing the Na+/Ca2+ ratio at a given salinity increased the relative growth rate. These results suggest that at salinity levels of 4.5 and 9.5 dS/m, reducing the Na+/Ca2+ ratio to 2 improved the relative growth rate of both rootstock-scion combinations compared to their response at equal salinities when the Na+/Ca 2+ ratio was 50. However, the trend of data showed that Kerman scion on a PGII rootstock had higher growth in 9.5 dS/m salinity level than the same scion on a UCBI rootstock. For all plants at each Na+/Ca 2+ ratio (2, 20, and 50), increasing the salinity level did not significantly increase the Na+ and Ca2+ concentrations in the mature leaves. At each Na+/Ca2+ ratio, increasing salinity did not affect mature leaf K+ and Mg2+ concentrations in Kerman on PGII rootstocks. Increasing salinity decreased the Mg2+ concentrations in mature leaves of Kerman on UCBI but did not change mature leaf K+ concentration.
机译：已经发现减少钠的含量可以改善在盐条件下生长的农作物，但对其在开心果树上的作用知之甚少。因此，进行了一项实验，以确定两种砧木的生理反应，这两种砧木都与雌性Kerman接穗一起萌发了（UCBI幼苗（P.atlantica x P.integerrima）和PGII克隆（P.integerrima x P.atlantica）， P.vera cv。Kerman）达到两个盐度水平，且具有三个Na + / Ca2 +比。六个盐度处理和一个对照重复五次。六种处理方法分别是配制的NaCl和CaCl2的混合物，以在每种盐度处理中产生两种水平的盐度（4.5和9.5 dS / m）和三种不同的Na + / Ca 2+比（摩尔比分别为2、20和50）。 。在60天的治疗期内，测量了黎明前的SWP和相对增长率。实验结束时，收获所有植物，并测量叶片中的Na +，K +，Mg2 +，Ca +2和Cl-浓度，并测量根，砧木和接穗子中的Na +浓度。基于相对增长率，PGII的Kerman比UCBI的Kerman更耐盐。与UCBI上的Kerman相比，PGII上的Kerman在其细根中积累了更多的Na +，但向其成熟叶片转移的Na +却更少。在大多数情况下，在给定盐度下降低Na + / Ca2 +比可提高相对生长速率。这些结果表明，在盐度水平为4.5和9.5 dS / m的情况下，将Na + / Ca2 +比例降低至2可以提高两种砧木-接穗组合的相对生长速度，而在Na + / Ca 2+比为100 50.然而，数据趋势表明，PGII砧木上的克曼接穗比UCBI砧木上相同的接穗的盐分水平高9.5 dS / m。对于所有Na + / Ca 2+比（2、20和50）下的所有植物，增加盐度水平并不会显着增加成熟叶片中N​​a +和Ca2 +的浓度。在每个Na + / Ca2 +比例下，盐度的增加不会影响PGII砧木上Kerman中成熟叶片的K +和Mg2 +浓度。盐度的增加降低了UCBI上Kerman成熟叶片中Mg2 +的浓度，但未改变成熟叶片K +浓度。

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  • 作者

    Mortaz, Morad.;

  • 作者单位

    University of California, Davis.;

  • 授予单位 University of California, Davis.;
  • 学科 Soil sciences.;Plant sciences.;Horticulture.
  • 学位 M.S.
  • 年度 2016
  • 页码 68 p.
  • 总页数 68
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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